Shuttle



I. SNOW. SHLLTTLE.

APPLICATION FILED DEC-26, 1919.

1, 344 ,734. Patented June 29, 1920.

' 2 SHEETS-SHEET 1.

I. SNOW.

SHUTTLE.

APPLICATION FILED DEC-26' l9l9.

1,344,734. Patented June 29, 1920.

2 SHEETS-SHEET 2.

To all whom it may concern:

umreu STATES. rA ENro Fic j ISAAC snow, 0F LAWRENCE, MASSACHUSETTS.

sHUTTLny Be it known that I, ISAAC SNOW, aicitizen of the United States, residing vat'Lawre'nce,

in the county of Essex and State of Massachusetts, have invented certain new and useful Improvements in Shuttles, of whichthe following is a specificationg I My invention relates to an improvement in shuttles, more particularly of the self threading type for weftreplenishing looms.

The object of my invention isto provide a shuttle threader of simple construction which can'readily be located in a threading chamber, one in which the. operation of self threading may be performed with certainty I and onein which, when threaded, dethreading will be impossible or very improbable.

Other purposes of my invention are to reduce the likelihood of ballooning by the thread and the. elimination of all points, beaks, or otherprojecting parts in any'position where a loop of the thread can catch or loop around them. i i

For convenlencejand for thepurpose of identification in this specification, I wil-lcall the front, that end of the shuttle where the eye is located, and the other end of the shuttle the back.

I will call an eye which passes out of the leftside when lookingat the front point, a left eye, and an eyeon the opposite side, a right eye. p

In all the figures of the drawings, Ishow a shuttle with a left eye, and mall the fig.

ures the thread on the bobbin is supposed to be wound in the usual way, shown in Figure 1, that is, from left to right it goes over, thence down under from right to-left;

I will call the top of the shuttle as it'runs ina loom as the topv side, and the bottom as the bottom side. i In the drawings, Fig. 1 1st}. plan view of the front end of a shuttle with a metal threading block to which isattached, and in which is embodiedmy device. Fig. 2 is an elevation from the left of Fi.l.

ig, 3'is a view similar to Fig. 2 of a threading block in which my invention is incorporated, the. shuttle being indicated by dotted lines and portions of the block being shown as broken away to show more clearly the course of the thread, and the thickness 7 Specification ofLettersPa'tent. Application filed vIkceinber 26, 1919. Serial No. 347,579.

Patented June 29, 1920.

I of the sheet metal parts being shown as exaggerated for clearness.

big. 4 is a sectionv on line 4-4 of Fig. 1

looking from the left, that is, in the direc- 3 tion of the arrows. In this figure the thickness of the metal is somewhat exaggerated and the thread is shown as it would appear arter aloop has formed and is clearing itselffrom the hook.

Fig.6 is a front elevation'of a shuttle with h device attached.-

F 1g. 6 is an elevation from the side opposite that shown in F ig. 3 of a threading block in which my deviceis incorporated.

Fig. 7 is a front elevation and Fig. 8 a

' view thereof finished.

S is a shuttle havingthe usual bobbin chamber 10 for the bobbin B from which the thread A is unwound. .12 is the threading chamber which extends forward in continuation of bobbin chamber 10, and 13 is the delivery passage which extends still farther forward from the, threading chamber. 4 H represents the shuttle eye in the wood, and

I this connects with the threading chamber 12 through the slot 15 and the slot 1 1 cut away from the delivery passage 13.

The usual bearing pins 17, 17 are shown.

An important feature of my device is the thread directing guide plate G which, in Figs. 1 to 9, is shown as being attached to,

by being set into, a threading block F.

I may attach such a sheet metal thread directing guide plate to athreading block, such as F, which has at the'f'ro'nt end a horn 32,

at the bottom a projection 34; which sets into a recess in the wood of the shuttle, and a hole 35 forretaining bolt or screw 36, all in a well known manner. Such threading block G is shown as having a longitudinal passage 131 and side walls 130 and 133.-

which together, form an interior threading chamber somewhat smaller than the thread:

ing chamber 12 in the Wood.

The thread directing guide plate G preferably has a nose 19 which extends forward:

of the shuttle eye outlet H and at 22 slopes down-and back from the nose and down andout through the threading chamber toward the side of the shuttleaway from the shuttleis shown as sloping down andback from the nose 19, is bent under to form a thread retaining guide hook 24: which is shown as extending from under the guide plate up to a point back of the shuttle eye and proximate the bobbin chamber.

Directly in front of this hook at is an open space 25 which may continue out to the nose 19, but I prefer to bend over. the bottom edge of the guide platevto form a hooked rim 2? which extends uncle the sloping forward part of the thread directing guide to a point in front of the-shuttle eye and preferably up to the nose 19. This is preferably cut away the front and'hack to rake forward and back.

I prefer that my guide hook 24;- should be so cutaway from the rear that it will rake somewhat forward andthat its frontedge should be formed so that the hook will narrow in whereby ar' loop of the thread A which maybe formed willtend to slip off;

By so cutting away the trapping rim and.

known form being of somewhat triangularshape, and has a forward edge 31, which becomes part of the heador extension from horn 32 of well known type. Preferablythe metal at 6 extends forward curving down along slope 22 as shown in Figs. 4, 3 and 6. I also show a thread pin 33 around which the thread A passes when the shuttle is correctly threaded.

I prefer that my thread retaining hook guide 24; should be so cut away from the rear that it will rake forward, as clearly shown in Fig. d, and. will taper either to a blunt or sharp point, and I prefer that my trapping rim 2? should be cut away at its front and back, both for the purpose of causing loops formed by the ballooning or throwing of the thread to clear themselves.

Inthe operation of my device, the thread A is held in a loom beyond the front end 8 of a shuttle, and as the shuttle recedes the thread rapidly u'n winds from the l)OlDl)lZI- B,

traveling in a path whieh'may be likened to a cone which bellies tosome extent. The thread flying over the sloping side of my guide plate naturally follows it and slips down under and into. the thread trapping rim 27', if such is used.- .As itis now caught in the nose-or mouthat the front1of5rim27, the apex of its cone ofrevolutionis;brought nearer to hook: 2e, and the thread: being trapped, sotospeak, slips more easily. over.

such hook.

This mouth 1 01 of rim 2? controla-the ballooning or bellying of the thread, and also holds .it up=unden the topof the guide plateso that, when the Slllflfgillt, stops, any loop forinedgby the slackening of the. thread drops down intoithe.delivery passage 13.011 grooves 14:- and ldwh reit can do no harm.

Such holdingup, in fact, helps .it; to drop into the grooves. and: 15 onthe second pick when the shuttle is returningandtends to overcome any tendency: to goover to the right and. unthread.

By makingmyguideplateG of trumpet shape with the top edge of trapping rim27. (.oove the bottom of mouthlOl. andrthecurl of'rim 27 'andmoutlr10l'. small, the ballooning of the threadtis .limited and'its tendency to throw or loop. is greatly. reduced.

Generally, during the first pick; the thread runs through the guide hook; 2-and trapping rim 2?; while on the second-pick it slips-over the. cut-away front; edge of rim 27' and, passing through the open part 25 ofthebottom edge. of: guide plate Gr, itruns out through the shuttle eye H around the friction pin 38.

It has been proposed to formthe guide hook 24 of such length that lti will curlback on itself' underthe guide plate in involute form, butl prefer to.cut itolf at the point indicateth shown asislightly llJOVG-tllG-llOIl: zontal, and toprovidev a locking guide 80 shown as. attached to back end: of} the threading block so as to extend into the threading chamber: back of-and overlapping the guide. hook, preferably at'such a dist tance. therefromfas lZO-flllOW thethread to slip around the outside of the guide plate and guide hook to the; insidethereof This locking guide does not interfere with the thread getting into the guide hookbut, as it overlaps the latter, it prevents the thread from flying out therefrom. v

' Moreover, it permits thesthread to balloon in an oval with vertical axis, which is' considered an advantageon some classeszof work. I

Preferably I also bore a hole 84: through the threading block Fat such a'point that the top of such-hole willbe in front'of and overlapping the guide hook; I then fill this with friction. material, such as felt, 85,

which will be in front of and overlapping the guide hook 24, and this, with the locking guide '80, effectually hold the thread in place after it hasslip ed in on the second pick. v

. If, on account of ballooning or for any other cause, the thread slipsout of the eye H and back through the passages .14 and 15, it ordinarily would betrapped'by the rim 27, but "if it escapes therefromor ,does not enter tlierein, itmay work back past the friction and run out through the open space 25, stillbeing/held by the guidebook 24 until the next throw, when it will'rethread.

While I prefer to use a trapping rim27 of hook form, Imay 1188.3.1'1111, such" as shown at 86 in-Fig. 10, which extends Well down but it not curled up. Such a trapping rim, especiallyif it and nose' 19 run well forward, tends to prevent the thread from unthreading between ;the first and second picks and tothrow .the thread toward the eye in the wood for threading.

ing. 7 1

In Fig. 11, instead of the round hole for friction material, .I show. a square cut 38 for the reception of friction material 39' shown as extending up, overlapping the guide hook. I

In Fig. 12, I show a construction in which the inside edge of guide hook 2 icomes in fairly close to the inside wall133-of the blank as it is cast, and Fig.14 shows the same blank when finished.

This threader consists of a single piece of metal in which the threading block and guide plate, locking guide and other parts are all integral. threading chamber near the back of which may be cast a depression 287 in line with I show Fig.'10 as. a single complete cast- 231 is a longitudinal and to receiveiguide hook 224. The locking guide 286 is formed by the metal left at the back of this depression.

The trapping rim 227, guide hook 224 andsthe open space or runway 225, with the guide plate222, are all cast or formed flat and. at substantially right angles to and integral-With a high sidewall 233 of the threading'chamber and extend over theopposite low wall 230.

The latter must be made low enough to permit the guide hook 224: to be bent with.

guide plate 222, as shown by the dotted lines in Fig. 14, and then over it into the position shown by the full line in Fig. 14.

' The friction overlapping the guide hook 224 at the front may also be regarded as a locking. guide therefor.

Iclaim: 1. The combination in a shuttle having an I eye, a: bobbin chamber, and a threading chamber in continuationthereof which 'connects with the eye, of a thread directing guide plateso .fixedto the top side of the shuttle asito V extend into the threading chamber, such guide plate havingaf nose which extends forward of the eye and having a bottom rim whichslopes. down and back from the nose and down and forward a thread trapping rim of hooked form which extends under the sloping forward part of the thread directing guide plate,

. with a thread retaining hook guide which extends from and under the thread-directing guide plate back of the shuttle eye and of the trapping rim, and a locking guidewhich extends. into the threading chamber .back of 'andoverlapping saidhook guide, together, with a friction which extends in. front of and overlapping said hook guide.

2. Thecombination in a shuttle having an eye, a bobbin chamber, and a threading "from'the back through the threading cham ber and at theside slopes down and out, and

chamber in continuation'thereof which connects with the eye, of'a thread directing guide plateso fixed tothetop side of the shuttle as to extend into the threading chamber, such guide plate having a nose which extends forward of the. eye andhaving a bottom rim which slopes down and back from the nose and down and forward from the back through the threading. chamher and at the side slopes down. and out, and a thread trapping rim of hooked form which extends under the sloping forward part ofthe thread directing guide plate,

with a threadretaining hook guide which extends from and under the thread directing guide plate back of the shuttle eye and ofthe trapping rim, and a locking guide which extends into the threading chamber back of andoverlapping said hook guide.

3. The combination in a shuttle having an eye, a bobbin chamber, and a threading chamber in continuation thereof which connects with the eye, of a thread directing guide plate so fixed to the top side of the shuttle as toextend into the threading cham ber, suchgi'iide plate having a nose which extends forward of the eye and having a bottom rim which slopes down and back from the nose and down and forward from the back through the threading chamber and at the side slopes down and out, with a thread retaining hook guide which extends from and under the thread directing guide plate back of the shuttle eye-and of tlie trapping rim, and a locking guide which extendsinto the threading chamber back ofand overlapping. said'hook guide;

4h The combination in a shuttle having'an eye, bobbin chamber, and a threading chamber in continuation thereof which connects with the eye, of- 'a thread directing guide plate so fixed to the topside ofthe shuttle as to'extend into the threadingcham her, such guide plate having a bottomarini which slopes down and back throughthe threading chamber and at the side slopes down and out with'athread retaining hook guide which extends from and under the thread directing guide plate back of the shuttle eye, and alocking guide which extends into the threading chamber back of and overlapping the hook guide at such a distance therefrom as to allow the thread to' slip around the outside and to the insideof the hook guide;

5. The combination in a shuttle having an eye, a bobbin chamber, and a threat ing chamber in continuationthereof which connects with the eye, of a thread directing guide plate so fixed to the top side of the shuttle as to extend into the threading chamber, such guide plate having a bottom rim which slopes down and back through the threading chamber and at the side slopes downand out, with a thread retaining hook guide which extends from and under the thread directing guide plate back of the shuttle eye, and a locking'guide which ex tends into the threading chamber back of and overlapping the hookguide;

6. The combination in a shuttle having an eye, a bobbin chamber. and a threading chamber in continuation thereof which connects with the; eye, of a thread directing guide plate so fixed tothe top-side of the shuttle as to extend into the threading chamguide which extends from and under the thread directing guide plate back of the shuttle eye, and a locking guide which extends intothe threading. chamber so as" to overlap the hook guide.

7'. The combination'in a shuttle having an eye, a bobbin chamber, and a threading chamber in continuationthereof winch connects with the eye, of a thread directing guide plate so fixed to the top' side of the shuttle as to extend into the threading chamber, such guide plate having a nose which extends forward of the eye and having a bottom riin which slopes down and back from the nose and down and forward at the back edge through'the threading; chamber and 'at the side slopes down and out, and a thread trapping rini of hooked form which extends under the slopingforwardpart of the thread directing guide plate.

8. A shuttlethreader having alongitudinal threading chamber and a thread directing guide plate which extends from the top into such threading chamber, said guide plate having a' bottom rim which slopes down and back t-hrough' the threading chamber and at the side'slop'es down andout, a thread trapping'rim of hook form'which ex tends from and under the sloping forward part of the thread directing guide plate, a thread retaining guide hook which extends from and under the thread directing guide plate back of the thread trapping rim, and a locking guide which extends into the threading chamber seas to overlapthe hook guide.

9. i shuttle threader having a longitudinal threading chamber and a thread directingguide plate which extends from the top into such threading chamber, said guide plate having a bottom rim which slopes down and back through the threading chamher and at the side slopes' down and out, a thread retaining guidebook which extends from and under the back part of the thread directing guide plate, and aloc'king guide which extends into the threading'chamber so as to overlap the hook guide.

In testimony whereof I have afi'ixed my signature.

lbAAC SNOW. 

